specious

From Latin speciōsus (“good-looking”).

• (UK, US) IPA^(key): /ˈspiːʃəs/

• Audio (US)

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• Rhymes: -iːʃəs

specious (comparative more specious, superlative most specious)

1. Seemingly well-reasoned, plausible or true, but actually fallacious.

   Synonyms: fallacious, insincere

   This idea that we must see through what we have started is specious, however good it may sound.

   • 1649, John Milton, Eikonoklastes:

     now to the discourse itself, voluble enough, and full of sentence, but that, for the most part, either specious rather than solid, or to his cause nothing pertinent.

   • 1776, Thomas Paine, Common Sense,

     I have frequently amused myself both in public and private companies, with silently remarking, the specious errors of those who speak without reflecting.

   • 1986, John le Carré, A Perfect Spy:

     “Number two is that for reasons which I regarded at the time as specious and insulting, the Americans objected to your husband's presence on that committee not three weeks after it met, and asked me to replace him with somebody more to their liking. Since Magnus was kingpin of the Czecho operation and of several other little shows in Eastern Europe besides, this was a totally unrealistic demand."

2. Employing fallacious but deceptively plausible arguments; deceitful.
   • 1829, William Phelan, Mortimer O'Sullivan, Ireland: A digest taken before Select Committees of the two Houses of Parliament, appointed to inquire into the State of Ireland, 1824—25, in The Christian Review and Clerical Magazine, Volume III, page 472,

     But a third cause of the delusion is, that the Church of Rome has become more specious and deceitful than before the Reformation.

3. Having an attractive appearance intended to generate a favorable response; deceptively attractive.

   Synonyms: meretricious, pretextual

   • 1760, William Warburton, The Lord Bishop of Gloucester's Sermon Preached Before the Right Honourable the House of Lords, January 30, 1760, page 19,

     And could any thing be more ſpecious, or more equal, than that fair diſtribution of power and profit, which men called the NEW MODEL?

4. (obsolete) Beautiful, pleasing to look at.

• specious present
• specious tiger (Asota speciosa, a species of moth)

• speciosity
• speciously
• speciousness

• spurious

• cosies up